Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add javiarmesto/ALDC-AL-Development-Collection --skill skill-agent-instructionsgit clone --depth 1 https://github.com/javiarmesto/ALDC-AL-Development-CollectionWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/javiarmesto/aldc-al-development-collection/skill-agent-instructions)<a href="https://agentmods.dev/skills/javiarmesto/aldc-al-development-collection/skill-agent-instructions"><img src="https://agentmods.dev/badge/skills/javiarmesto/aldc-al-development-collection/skill-agent-instructions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/javiarmesto/aldc-al-development-collection/skill-agent-instructions"><img src="https://agentmods.dev/badge/skills/javiarmesto/aldc-al-development-collection/skill-agent-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00082 | $0.02588 |
| Opus 5 | $0.00041 | $0.01294 |
| Sonnet 5 | $0.00016 | $0.00518 |
| Haiku 4.5 | $0.00008 | $0.00259 |
Grade A, and why
skill-agent-instructions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 246 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BC Agent Instructions Skill
Generate production-quality natural language instructions that guide Business Central agents. These instructions define what the agent does, how it behaves, and what steps it follows in the BC UI.
Context: What Are Agent Instructions?
Agent instructions are natural language text stored in .resources/Instructions/InstructionsV1.txt (SDK agents) or pasted into the Agent Designer wizard (no-code agents). The BC agent runtime interprets these instructions to navigate pages, read/set fields, invoke actions, and communicate with users.
Key facts:
- Instructions are the PRIMARY lever for controlling agent behavior
- The agent runtime has specific tools: field setting, lookups, action invocation, page navigation, email composition
- Instructions must use specific keywords to activate these runtime tools effectively
- Only English is fully supported — safeguards are optimized for English
- Shorter, well-structured instructions often outperform verbose ones
References:
Storage Modes
| Mode | Storage | Loaded By |
|---|---|---|
| SDK | .resources/Instructions/InstructionsV1.txt |
NavApp.GetResourceAsText() → SecretText → Agent.SetInstructions() |
| Designer | Paste into Agent Designer wizard text field | Runtime reads directly from configuration |
Framework: Responsibilities → Guidelines → Instructions
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 246 lines · 82 tokens per session scan A 914bacb10732
skill-agent-instructions is a skill published in the GitHub repository javiarmesto/ALDC-AL-Development-Collection (104 stars, last pushed today), licensed MIT. It adds 82 tokens to every session and 2,588 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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